US3792257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lateral photodetectors
Assignee: United States Department of the Navy
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Filing: 1972-03-31
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Granted: 1974-02-12
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Expires: 1992-03-31
Abstract
Abstract Lateral photodetectors modified such that the resistivity of the photodetector wafer is selectively varied as a function of lateral position to achieve X, Y linearity (rectilinearity).
Inventors
- 👤 K Gardner
- 👤 K Labaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:55
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/95; H10F77/953; H10F77/957
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A lateral photodetector having a radiation sensitive surface and a plurality of regularly spaced ohmic contacts wherein said contacts lie in a plane substantially parallel to the sensitive surface and the contacts and the sensitive surface are separated by a semiconductive material, including means for varying the resistivity of the semiconductor material as a function of lateral position such that the resistance between any contact and any point on said surface is a rectilinear function, wherein said varying means includes a plurality of conductive dots attached to the surface of the semiconductive material nearest the contacts and positioned between the contacts.
Claim 2
Dependent Claim
101 words
A lateral photodetector having a radiation sensitive surface and a plurality of regularly spaced ohmic contacts wherein said contacts lie in a plane substantially parallel to the sensitive surface and the contacts and the sensitive surface are separated by a semiconductive material, including means for varying the resistivity of the semiconductor material as a function of lateral position such that the resistance between any contact and any point on said surface is a rectilinear function, wherein said varying means includes a plurality of conductive dots attached to the surface of the semiconductive material nearest the contacts and positioned between the contacts.
Claim 3
Dependent Claim
16 words
The photodetector of claim 1 wherein said conductive dots are uniformly spaced and ununiform in size.
Claim 4
Dependent Claim
16 words
The photodetector of claim 1 wherein said conductive dots are uniform in size and ununiformly spaced.
Claim 5
Dependent Claim
119 words
A lateral photodetector having a radiation sensitive surface and a plurality of regularly spaced ohmic contacts wherein said contacts lie in a plane substantially parallel to the sensitive surface and the contacts and the sensitive surface are separated by a semiconductive material, including means for varying the resistivity of the semiconductor material as a function of lateral position such that the resistance between any contact and any point on said surface is a rectilinear function, wherein said varying means includes uniformly spaced Schottky barrier dots attached to the surface of said semiconductive material between said contacts, an illumination source, and a masking means positioned between the illumination source and the photodetector for causing said dots to be selectively illuminated.
Claim 6
Dependent Claim
119 words
A lateral photodetector having a radiation sensitive surface and a plurality of regularly spaced ohmic contacts wherein said contacts lie in a plane substantially parallel to the sensitive surface and the contacts and the sensitive surface are separated by a semiconductive material, including means for varying the resistivity of the semiconductor material as a function of lateral position such that the resistance between any contact and any point on said surface is a rectilinear function, wherein said varying means includes uniformly spaced Schottky barrier dots attached to the surface of said semiconductive material between said contacts, an illumination source, and a masking means positioned between the illumination source and the photodetector for causing said dots to be selectively illuminated.
Claim 7
Dependent Claim
13 words
The photodetector of claim 4 wherein said masking means is a photographic negative.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |